Multiple-spindle drilling machine



E. P, BULLARD, JR

MULTIPLE SPINDLE DRILLING MACHINE Filed April 4, 1924 8 Sheet$heet l jog l E. P. BULLARD. JR

MULTIPLESPINDLE DRILLING MACHINE Filed April 4, 1924 8 sheetsheet WL MMM/Mummy l 5,703 July 12 1927 E. P. BULLARD. JR '63 MULTIPLE SPINDLE` DRILLING MACHINE Filed April 4, 1924 8 Sheets-Sheet 3 Edwafdziuzzdmi ZF 1,635,703 July 12 1927' E, P, BULLARD, JR

MULTIPLE. SPINDLE DRILLING MACHINE Filed April 4. 1924 8 Sheets-Sheet 4 1,635,703 July l2 1927' E. P. BULLARD, JR

MULTIPLE SPINDLE DRILLING MACHINE humm (inging/.s

-Jul'y 12, 1927. 1,635,703

E. P. BULLARD, JR

MULTIPLE SPINDLE DRILLING MACHINE Filed April 4, 1924 8 Sheetssneet e 1,635,703 July 1.2 1927' E. P. BULLARD, JR

MULTIPLE SPINDLE DRILLING MACHINE Filed April 4, 1924 8 Sheets-Sheet '7 EdwardfBul/ard .55.'

' mechanism.

Patented July 12, 1.927,. v

UNITED STATES( PATENT oEElcE. nnwnnn i. BULLnnD, an., or srrnr-Fonn, oomc'rfcu'r, salomon To 'rmi BULLABD' MACHINE moon ooHrANY, or BBmGnPon'r, oonnnc'rrou'r, ln coBronATIoN or coNNEcrIcUr.

Hummm-SPINDLE nannies MACHINE.

Application sued April 4, l1am.. semi 1104705066.

A fitta-5,793

This invention relates to a multiple spindle machine tool of the type commercially known as the Bullard Dril-Au-Matic, and particularly a machine tool for drilling, threading or boring operations, and in which the work is secured by means of chucks upon a Work table which is intermittently rle4 volved to diferent work stations, and at which stations individual tool mechanisms operate upon the work; one of the stations, which is a work removin and loading station, being not provided with such tool An object of the invention is to provide a machine of this character in which the indexing mechanism of the Work carrier will be co-related with the respective tool mechanisms that the operation of the tools will be synchronized and automatically brought into and out of operative relation with the work.

A further object is to provide a machine in Which the stroke, speed and timing of the tools may be adjusted as desired to suit the particular Work being done.

It is further proposed to provide a novel form of tool mechanism in which the tools will be brought into and out of working relation with the work at relatively great traveling speed, and While in cutting relation with the work itself the traveling speed will be relatively slow.`

lVith the above and other objects in view an embodiment of the invention is shown in the accompanying drawings, and this embodiment will behereinafter more fully described with reference thereto, and the invention will be finally pointed out in the In the drawings: Y' Fi 1 is a vertical sectional view of a multiple spindle machine tool according` to the present embodiment of the invention.

Fig. 2, is a horizontal Sectional view taken on line 2 2 of Fig.l 1 and showing a part of' Fig. L5- is a horigontal sectional view taken 4 is a horizontal sectional viewgzaken on line 5 5 of Fig. 1 and showing the indexin .clutch means;

1g. 6 is a horizontal sectional view taken along the line 6 6 of Fig. l;

Fig. 7 is a horizontal sectional plan view taken along lme 7 7 of Fig. 1 and showin the severa tool feed works, the left han feed worls being along tlie upper level, the mtermedlate one being along an intermediate level and the right hand one being along ythe lower -level of said line;

Fig. 8 is a detail vertical sectional view of one of the feed Works;

Fig 9 is a transverse detail vertical sectlonal view thereof taken on line 9 9V of Fig. 8;l

ig. 10 is a horizontal sectional view taken along line 10 10 of Fig. 8;

Fig. 11 is a diagrammatic perspective view of the main elements of the feed works; and

Figs. 12 to 15 are diagrammatic views of the clutch shifting mechanism employed and respectively showing the same in the several operative positions thereof.

Referring particularly to Fig. 1 of the drawings, the machine comprises a base 20 provided interiorly with a centrally disposed flange 21 upon which a stationary vertically disposed cylindrical column 22 is supported and upon the upper end of which column the housing 23 for vthe tool mechanism is mounted. Upon the lower portion of the column 22 and within the base 20 there is rotatably mounteda Work carrier 24, radialtermittently rotated'a quarter turn from the loading station, to` be brought into successive ly slotted, as at 25 (Fig. 4) to receive suitrelation with the several tool mechanisms of disposed vertically'within the upper portion of the machine, and adapted to be operated in any 'suitable manner, as for instance by means of an electric motor geared thereto, or by belting extending over the illustrated vpulley 27, geared to the shaft 26 by means Q PIlOllS 28 and 29, The shaft 26 operates both the carrier indexing mechanisms and the tool leed worlm` mechanism.

lllpon the shalt there is provided a clutch mechanism indicated generally as 30 and a feed worlrs mechanism drivingr pinion 3l connected to the clutch, and which are substantially similar in construction and operation to the clutch mechanism shown in U. El, patent to Edward P. Bullard dr., $1,360,173. 'lhe clutch 30 is adapted through cooperation ot a cam member 32 mounted upon a central control shalt 33 journaled in suitable bearings 3d and 35 et the housing; 23, to intermittently connect and disconnect said driving,I pinion 3l to the shalt 526, so that the lool leed worin; are in operation between the inderring periods ol the carrier, and out of operation during said periods. rthe pinion 3l meshes with and operates a large central gear 3G looselyT mounted on a standard 37 surrounding the central shaft 33 and which gear is common to and drives the several tool leed works mechanisms. rl`he clutch mechanism 30 is adapted to be manually operated when desired by means of a vertically disposed rotary shaft 38 mounted in the upper portion 23 of the machine and connected by a transverse arm 3S) to the clutch, said shaft being,r further provided with an arm 38 that is engaged by a` pin carried on a slidable annular operatingF ring 38 which encircles'the upper portion of the machine, so as to control its operation from eitherl side.

At the lower end of the shaft 26 there is provided a spiral pinion Ll meshlng with ay horizontally disposed spiral pinion ell, upon the shat't of which there is provided a worm 12, which meshes with and continuonsly drives a spiral gear d3 loosely rotatable upon the lower portion 4l of shaft which extends downwardly through the column 22, being` journaled in suitable bearings l5 and 4G provided in said column.

The machine as designed, in a way constitutes two units or two series of mecha.- nisms, one ol' which is contained within the upper part of the machine and designed to,

operate the tool carrying slides, while the other unit is located in the lower part of the machine and constitutes the mechanism for indexing and locking the carrier. The operation of th-e mechanism contained within the lower unitis in a measure controlled through the connections with and the mechanism comprising the upper unit, und that in turn may be controlled or started and stopped through the manipulation ot the manually operable shaft 38 which actuates the clutch mechanism 30 to stop the rotation of the tool driving gear 36.-

As before pointed out, the clutch is also operated intermittently by the cam member 32 mounted upon the shaft 33, the clutch having an extended arm 47 provided with leemos a roll Ll@ which normally lies in the path ot cam portions fil-9 and 50 upon said cam member and which positively moves the arm up anddownto open and close the clutch, one ot said cam portions serving to intermittently engage and the other to disengag-e the clutch. lhe control shalt 33 is also provided above the cam 3i?. with a series ot' three lugs l lwhich project radially at dit'- terent levels, and each being adapted to engageA a slide rod d, hcreinatter more fully referred to, of aI particular one oi the tool feed wrlrs mechanisms. rllhe control shaft 33 upon which the cam 32 and thc lugs 5l are mounted also supports an indering controller member 52 mounted near its lower end.

Thus the shaft 33 with its cam. lugs and controller member is a single means lor controlling the severa-l operations ot the machine, as will hereinafter more fully appear. f

HUpon the lower portion of the sha-ft 44 is mounted a gear 53 that meshes with and drives another gear 54 mounted upon a crank shaft 55 journaled in bearings 56 formed upon the inside of the column 22, said shaft carrying upon its lower end a cra-nir 57 connected to an indexing arm 58, havingn u, straight guide-way 59 formed in its upper face to engage and disengage the several indexing rollers 60ct the carrier to index it, there being four such equally spaced rollers in the present embodiment of the invent-ion. In operation the arm 58 is given an oscillatory movement by reason of its being connected bv the ora-nk 57, carried upon the end of the rotatable crank shat't 55, and slidably connected to a shoe 6l, rotatably mounted in acylindrical bearingr portion 62, formed in thevlower end of the column 22 directly below and in axial alignvment with the shaft 44;; so that, with cach operation of the arm 58 one of the rollers 60 is engaged and the carrier Q4 is rotated through a quarter o'l' the revolution, thus movingI the work chucks secured upon the table portion of the carrier from one operating station to another. Thel carrier 24 is rotatably supported upon suitable thrust bearings G3 at the lower end of the column 22, and its upper end is disposed beneath the flange 64 of the said column.

In order to properly hold the carrier in position between the lndeXing periods and during the operation of the tools, and to effeet a quick release of the same when the work upon the carrier has been completed, there is provided a mechanism shown in Figs, 1 and 3 wherein it will be seen that there is mounted upon the shaft 44 a cam 65 against which bears a rollA 66 mounted upon the outer end of a rocker arm 67 pivoted at 68. This arm carries upper and lower shoes 69 thatl'sldably operate in a u groove of a collar mounted upon the re- Figs. l, 4, 5 and 6 comprises in part the duced end 7l of a lock pin 72, said lock pin above mentioned controllerv member 5,2 being slidably mounted in a bearing 73 of whichy includes a series of four equally the column 22. A spring 74 is in position spaced radial studs 82formedupon its face between the collar upon the reduced end of at dii'erent levels, and adapted to be en- Athe lock pin and the shoulder of the same gaffed by a like number of releasing and pin, so as to 'normally tend to hold the lock oc ing pins 83 mounted in the-column, three pin' to its seat. There is but one movable of whlc are adapted to be actuated by the pin 72 mounted in the column,whereas there three tool slides 84 mounted for vertically are four stationary lock pins `mounted in reclprocation u on the column in slide Ways the carrier, and positioned at equal distances 85, While the ot 1er one, provided at the orapart for engagement by the lock pin 72 YWard loadlng and unloading station, is prowhen the carrier is in position to co-operate vided with a handle 86 for manually moving with thetools. Itis apparent that with each It 1I1t0 and out 0f relation. with its respecturn of the shaft 44 and each quarter turn tlVe Stud 82, tlllS fOuI'tll releasing and lOClof the carrier the cam 65 will make a coming pin being normally out 'of engagementl lete rotation and serves to withdraw the. with the controller member during the ock pin 72 from one of the lixed lock pins operatlon of the machine. 75 and reseat it against the lnext fixed lock The three releasing and locking pins operpin which is brought into position to lock able by the tool slides are normally pressed therewith. Into engagement with the controller member In Order t() insure a more accurate posiin abutting and locking relation t0 the Studs tioning of the carrier with each stopping of 8 2 by means of springs 87, and are each prothe same, there is provided, in addition to vided at their outwardly projecting ends the above described lock pin mechanism, a with a cam surface 88 adapted as the slides binding device, which ispositioned about reach their uppermost position to be enone-third ofthe distance around the column, gaged by a camming portion 89 upon each to effect an engagement with the carrier slide to draw the pins otwardly, thereby re- -simultaneously with that of the lock pin, so leasing the controller member. Inasmuch as as to positively insure the accurate positioneach pin 83 functions to independently lock ing of the carrier with each setting of the the controller the latter will only be released same, and to prevent its possible displaceafter the last slide is fully up.

ment due to the cutting pressure of the tools. Upon release the controller is free to be This mechanism includes a lever 76 which is actuated by means of a spring 90, one end pivoted at 77 to the column and is provided of which is securedto alpin carried by the with an adjustable yieldably mounted screw controller (Fig. 3) and the other end to an 78 that contacts with a lug 79 formed upon arm 91 (Fig. 5) keyed to theshaft 44. The the under side of the cam 65. A plug 80 is action of this spring upon the controller slidably fitted in a radial hole formed in the member is merely to impart to it a slight face of the cylindrical portion of the column preliminary rotary movement suiicient to 22 in position to engage the innerwall of lock the continuously driven gear 43 to the the carrier and upon the arm 76 is provided shaft 44.

an adjustable member 81 to engage the inner The locking means employed includes a end of the plug 80 so that with each rotation bell crank lever 92 which is pivotally mountof the cam 65, and the positioningof the ed upon the arm 91, the longer arm of the same as in Fig. 3, to effect the locking of the bell crank having a pin 93 that is disposed carrier to the column, the lug 79 of the cam upward and engages a socket 94 formed in will be brought to register with the screw 78 a plate attached to the ,un-der side of the conof the arm l76, so as to throw thesame out troller member, so that the above mentioned and in turn force the plug tightly against rotary movement of said member imparted the wall of. the carrier, and thereby causing by the action of the spring will tend to swing engagement at that point; as well as at the thebell cra-nk lever upon its pivot. The point engaged by the locking pin 72. short arm of the bell crank also carries a The matter of the releasing, starting and pin 95, that engages a cross slot in a lock indexing of the carrier, as well as the bindpin 96 slidably mounted in a guide way ing and locking of the carrier when again formed in the arm 91. The Outer end p0rpositioned, is controlled by a single unit sittion of this lock pin is positioned to engage uated within the upper portion of the colthe notches 97 in the clutchface 98 of the umn and mounted upon 4the central shaft`44, gear 43, said gear being loose upon the shaft which unit 1s 1n turn released by the`operaf44, so that upon engagement of the lock pin tion of the tool slides and particularly by therewith said shaft is rotated through the the last slide up in the operation of the Inakeyed connection of the arm .91 thereto to chine; that is, when the slides are s0 arindex the carrier. ranged that they do not all move alike. It is obvious that the controller member The indexing mechanism as shown in 52 .is also rotated with the clutch face 98 of lll `the gear 13, and that the shal't turns vvitli it causing the Cain. 32 to operate the clutch and the lugs 51 to engage the tool inecha nisni just prior to the completion of the einn gie revolution. its seen as the feed vverlrs mechanism starts to operate upon engagenient of the lugs 51 therewith and which mechanism and operation Will. loe presently fully described, the tool slides 8d start to nuove downwardly toward the work carrier, the lirst one starting releasing its loch pin 83 so that said pin inoves into the path of its respective lug 82 upon the controller' ineinber 52, and thereby stops the rotation of said nieniber at the completion of a single revolution. llllhen this occurs the continued rotation of the gear A13 and the erin 91 tensions the spring 90, to impart the nent starting inipulse to the controller upon release, and the bell crank lever 92 is rocked to with draw the locking pin 96 frein the clutch face 98 of said gear L13, thereby stopping the rotation of the carrier indexing shaft 114.

As before mentioned, the machine includes a series of three tool carrying slides for operating in conjunction with Work chucks upon the Work table of the carrier, and these are each operated through a separate set of feed Works arranged in the upper portion 23 of the machine, and positioned around the large gear 36, which is common to the several feed Works and through which they are driven. These several feed works are alike in construction and operation, and therefore a detail description of one set will be sufficient as applying to the others. 'The feed Works serves to nieve the tool carrying slides 8st up und down and also to rotate the tool drill 99 provided in each slide. It Will be understood that other forms of tools, than drills, and reaniers may be provided upon the tool slide, depending upon the particular character of the Work to be done.

The feed Works includes a freine 100 of special forni mounted in the housing 23 and the upper end of which the upper bearing 3d of the controller shaft 33 is bolted as shown in Figs. 1 and 8. Within this frame there is journaled -a vertical driving shaft 101 provided at its lower end with a gear 102 meshing with and driven by the common driving gear 36, which as before pointed out is driven by the continuously driven shaft 26. Y

At the upper end of the shaft 101 there is provided a gear 103 meshing with 'and driving a gear 104 provided at the upper end of a vertical shaft 105 also journaled in the frame 100, the shaft 101 adapted to drive a quick operating mechanism to bring the tool slide into and out of Working relation, while the shaft 105 drives a slow feedfor lowering the tool slide While the tool is in actual Working relation with the work, these weaves feeds beine clutched into e rative relation by inechanisin presently to ne described.

'llhe freine 100 is provided at each side with vertical slide Ways 106'and 107 in which a vertically slidable cross head 108 having an inclined slot 109 therein is mounted, and which is provided centrally with a downwardly extending rack 110 corn4 nected at its lower end, as at 111 (Fig. 1),to

a vertical rod 112 secured to and supporting the tool slide 811, so that upon raising and lowering movement of the cross head the tool slide is also raised and lowered. A ver ticaliy movable counteriveight 84 is con nected to the tool slide 8d by a chain 811-." passing over suitably arranged pulleys 8d".

rthe drill 99 of the tool slide 1s provided with an upwardly extending shaft 113, slid ably keyed at its upper end in a driving sleeve 114.` rotatably mounted in bearings 115 of the frame 100, and provided at its upper end with a large gear 116 meshing with an-4 other large gear 117, provided upon a stud shaft 118 secured to and depending from the upper side of the housing 23. A gear 119 is fixed to the under side of the gear 117 and meshes With a pinion 120 at the upper end of the shaft 101, this train of gears be ing adapted to rotate the drill 99 as it is raised and lowered.

.d horizontal shaft 121 is 'journaled in a bearing 122 in the frame 100 and has ke ed thereto a crank 'disk 123, carrying a ro ler 1211 which engages the slot 109,0f the cross head 108, and is adapted through rotation of the crank disk to raise and lower said cross head. A sliding clutch collar 125 is keyed to the shaft 120, being provided upon its inner face with clutch teeth 126, and upon the inner end of the shaft there is loosely rotatable a clutch sleeve 127, having clutch teeth adapted to be engaged by the clutch teeth 126, and provided with a worm gear 128 meshing with and driven by a. Worm 129 provided upon the shaft 101. The sleeve l127 is journaled in a forked bearing portion 130 of the frame.' When the clutch teeth 126 are engaged with the clutch sleeve 127 (Fig. 8) the crank disk is rotated with re1ative rapidity to impart a rapid movement to the cross head 108.

The slow feed mechanism consists of a spur gear 131 meshin with the rack 110 of the cross head, being eyed upon a horizontal shaft 132 journaled in suitable bearings 133 of the frame, and provided at its outer end with a larger spur gear 134 meshing with a spur gear 135 mounted upon a horizontal shaft 136 journaled in suitable bearing portions 137 of the frame. The horizontal shaft 136 is provided with a sliding clutch collar 138 keyed thereto, and having inclined ratchet clutch teeth 139 at its inner face. A. clutch sleeve 140 also having lltl ` inclined ratchet .clutch teeth l is loosely 'mounted on lthe shaft 132 in a suitable bearing portion 141 of the frame, and is adapted to be en ged bythe clutch teeth 139, said -clutch s eeve being rovided with a worm gear 142 meshing wit and driven by a worm 143 provided upon a horizontal shaft 144 journaled in bearings 145 of the frame, said shaft being provided at its end with a worm gear 146 meshing with a worm 147 provided on the shaft 105. When the clutch teeth 139 are engaged with the clutch sleeve 140, the

`il'apid feed clutch collar 125 being at the same time disengaged, slow downward feeding movementpis imparted to the cross head through the rotation of the pinion 131.

It is obvious that when the upper rapid motion clutch is engaged and the lower slow feed clutch disenga ed, .that a rapid downward movement wi be imparted to the tool slide; and that when the lower slow feed clutch is engaged and the upper. rapid feed clutch is disengaged, slow downward feeding movement will be imparted to the slide; `and further that when both clutches are disengaged, or in the neutral position, the feeding movement of the tool slide is stopped.` According to the present invention the rapid downward movement takes place from the n spring pressed pointed plunger 152 disposedv GIO uppermost position of the tool slide toan advinstable point calculated as-being Just prior -to engagement of the tool with the work, the

slow downward feed taking place from this point to the lowermost position of the toolA slide.

In this lowermost position a slight dwell occurs, during which the" slide is mo` tionless, and thereupon it moves to the up-l permost position through the operation. of

fthe rapid feed mechanism, mechanism presently `to be' referred to being brought into operation at thecompletion ofthe upward feed to move the clutches into neutral position. When in this neutral position the inl dexing mechanism operates. .As beore pointed out theatool feed works, mechanism is again brought into operation at the completion of the indexing operation through engagement of the. lugs 51 of the shaft 33 with the feed works.

Upon a. suitable bearing portion 148 of the frame 100 there is -pivotally mounted' a clutch shifting lever arm 149 provided at its vupper and lower ends with projecting lugs 150 and 151 respectively engaged with the upper and lowerclutch collars 125 and 138 and also provided in its upper end with a therewith an during this. slow feed.

gaged with the respective actuating lug 51 mounted on theshaft 33, 'and at its outer end is providedwith a lug 159 adapted to be en a describe Adjustable stops 157a and 157 are proed by stop means, presently to be mounted upon the crank disk 123,",

vided on the bearings 155 and 156 to abut .the member 157 and thereby limit the movements of the slide 154 in either direction.

It Will-be understood that the relation of the plunger end 152 of the clutch actuating lever and the knife edge cam 157 is such that'v upon the sliding movement of the slide 154 the plunger will be depreed without swinging the lever until the oint of the cm 157 is passe-d whereupon t e lever wllfibe `thrown` in either direction, depending upoi aul the direction in which the slide is moved,

with a quick snap action. As shown in Fi 12, the slide has been moved to the le t.

through enga ement of the actuating lug 51 the clutch operating lever upon passing the point of the cam 157 has been moved to its extreme position in clockwise direction, engaging the ra id feed clutch 125 and disengagingethe sow feed clutch 138.' The crank disk is therefore rapidly rotated to lower the cross head of the t'ool slide, thisv operationv continuing until the stop member 160 mounted within a concentric slot 161 'of the crank diskl engages the lug 159 at the forward end of the slide 154, thereby moving it inwardly to a point at which the cam 157 passes the point of the plunger 152 and the clutch actuating ,lever is swung in counterclockwise direction to the position indicated in Fig. 13

vand in which position the upper rapid move- -ment clutch A is disengaged and the lower slow movementl clutch 138 is engaged, so that the pinion 131 is caused to rotate, and slowly moves the .cross-head downwardly to its extreme lowered p0sition,.the rotating drill 99 being in engagement with the work The stop member is adj ust'ably mounted 4in the slot 161 by means of a clamping lne loi,

plate 162, which plate is provided with an indexing point 163 disposed in relation to a series of indexing 'marks 164 upon the face of the crank dis the adjusted position of this stop,160 determining the point in the downward movement of the cross head at .which the rapid feed is thrown out and the slow feed is thrown in. As the cross head reaches its lowermost-position an adjustable pin 1654 provided thereon engages the outer arm`of a bell crank lever 166 pivoted at 167 upon the frame 100 and having its lower end engaged with the lower end of a vertically disposed push rod 168 slidable in bearing portions 169'of the frame. At its upper end the push rod is provided with an inclined cam surface 170 adapted to-engage the inclined vend wall 171 of a cut-out 172 provided in the' slide 154 to move said slide to the left as indicated in full lines in 14. `This movement of the slide is not su cient to bring the point of the cam 157 past the point of the plunger 152 but brings said oints to within about one-eighth of an inch of each other. In this position the slow feed clutch is' still engaged, but the tool` slide has reached its lowermost position by reason of the fact that an adjustable stop 173 (Fig. 1) provided' upon the slide has engaged the flange 64 of the column 22- so that further downward movement of the` slide is not possible. The clutch collar 188 is therefore held against further rotary movement, while the clutch sleeve 140 continues to rotate. This condition causes the inclined ratchet teeth of the sleeve 140 to Aforce, the clutch collar to the left and which movement is suiicient to move the end of the plunger 152 past the point 157, whereupon the lower slow feed clutch .is thrown out and the upper rapid feed clutch is thrown in, as shown in dotted lines in Fig. 14, and the Jtool slide is rapidly moved to its uppermost position. It will thus be seen that in the lowermost position of the tool slide there is a short period or ldwell during which there' is neither u or down movement of the slide and after t iis stationary period the slide moves upwardly.

As the slide reaches its uppermost position a stop member 174 upon the crank disk engages the lug 159 of the slide 154, moving it to a position to swing the lever 149 to disengage the rapid feed clutch. As the lever is moved by engagement of the stop 174 with the lug 159 a projecting neutralizing pin 175 upon `the crank disk engagesa slide pin 17 6 mounted in the bearing portion 122 of the frame 100 moving said pin inwardl as indicated in Fig. 15, so that as the clutc 1 column 125 is disengaged from the clutch sleeve it abuts the slide pin 176 thereby preventing complete counterelockwise movement of the lever 149, so that the lower or slow feed clutch 138 is prevented from engaging the sleeve 140, and the clutches are thereby both laced in neutral position and the feedingoi) the cross arm and tool slide is stopped, being again started after the inflexing of the carrier by engagement of the lug 51 with the pin 158 of the slide 154, as before pointed out.

In order to manually adjust the position of the crank disk to raise or lower the tool slide the same is provided in its periphery with spiral worm teeth 177 enga'ed by a worm 178 journaled in bearings 179 of the frame and provided at the lower end of its shaft with a clutch face 180.

In normally spaced relation below the clutch face 180 a clutch face 181 is arranged upon the upper end of a shaft 182 mounted for vertica movement in a bearing 183.

Upon this shaft there is provided a grooved co lar 184 having an upper cone portion above which is disposed the forked arm 185 of a vertical clutch-neutralizing shaft 186 journaled in a bearing 187 of the frame, said shaft being provided at its upper end with a roller arm 188 engaging the clutch collar 138, and having a manually operable crank vhandle 189 at its lower end. The collar 184 is engaged at one end by alever 190, pivoted upontheframe 100 at'191, and engafred at its other end in the upper grooved \en of a vertically movable shaft 192, journaled in a bearing 193, and provided at its lower endwith a manually operable crank handle 194. The shaft 192 is furthermore provided with a sprocket gear 195 connected by a sprocket chain 196 with a` sprocket gear 197 provided on the lower end of the shaft 1,82. In lorder to adjust the tool slide the crank handle 194 is drawn downwardly to the dotted line position (Fig. 8), causing the lever 190 to be turned to raise the shaft 182 to engage the clutch 181 with the clutch 180. At the same time the cone surface of the collar 184 engages between the forked arm 185 rotating the shaft 186 to a neutral position, that is a position in which the clutches 125 and 138 are both disengaged from their respective driving means, so that the tool slide is free to be manually adjusted. Thereupon the crank handle 194 is turned, and through the sprocket chain 196 the shaft 182 is rotated to impart rotation to the worm 178, thereby rotating the crank disk to adjust the position of the tool slide. It is obvious that the handle 189 may be turned independently of the tool slide adjusting means to engage either of the clutches 125 or 188, or to move them into neutral position.

I have illustrated and described a preferred and satisfactory embodiment of the invention but it will be obvious that changes may be made therein within the spirit and scope thereof as defined in the appended claims.

Having thus described my invention, what I claim and desire to secure by Letters Pat# ent is:

1. In an automatic machine tool of the character described, a work support, a tool slide, rotary feed means having movement in one direction connected to said tool slide and i adapted to move said slide in a given point in relation to the work at one speed, other feed means adapted to move said slide to a given point in relation to the work at a diii'erent speed, said tool slide adapted by said secondary movement to move said first means with it during the movement to the limit of its traverse, said first feed means adapted to move said slide in return direction out of relation with the work at relatively rapid speed.

lull

2. a In an automatic machine` tool of the character described,y a\work support, va reciprocating tool slide, rotar feed means having' movement in one direction and. connected to said tool slide to feed it toward and awa from said work support at a given spee and other feedmeans connected to said slide adapted during a given period in the rota- -it toward and away from said Work support at a given speed and other feed `means connected to said slide adapted durin a given period. in the rotation of said rst feed means to impart secondary-movement to said slide at a different speed from the speed imparted by said first feed means.

4. In an automatic machine tool of the -character.described, a work support, areand away from said work support .at relatively rapid speed Aand other feed means connected to said slide adapted durin a given period in the rotation o said first eed means to impart secondary movement to said slide at relatively slow speed.

5. In an automatic machine tool -of the character described, a work support, a reciprocating tool slide, rotary feed means connected tosaid slide to feed it toward and away from said work support at a given speed, drive means therefore adapted to drive said feed means in one direction, a clutch for said drive means, other feed means connected to said slide, drivemeans therefore adapted to drive said other feed means in one direction at a. different-speed from said first feed means, a clutch for said second drive means, clutch shifting means connected to said clutches whereby as one is connected the other is disconnected, and means carried by said first feed means adapted to actuate said shifting means at a predetermined point in the movement of said slide toward the work to-connect said other feed means.

6. Inl an automatic machine tool of the character described, a work support, a reciprocating tool slide, rotary feed means c on-` nected to said slide to feed it toward and away from said work support at a given speed, drive means therefore adapted to drive said feedmeans in one direction, a clutch for said drive means, other feed means connected to said slide, drive means thereforev adapted to-drivensaid other feed means in one direction at a different speed from said first feed means, a clutch for said other feed means. s

7. In an automatic machine tool of the character described, a work support, a re- `ciprocating tool slide, rotar feed means connected to said slide, to lfee it toward and away from said work support at a given speed, drive means therefore adapted to drive said feed means in one direction, a

clutch for said drive means, other feed means -connected to said slide, drive means `therefore adapted todrive said other feed means in one direction at a different speed from said first feed means, a clutch for said second drive means, clutch` shifting -means connected to clutches whereby as one is connected the other is disconnected, and means actuated at the end of the movement of said slide toward the work adapted to actuate said clutch shifting means to connect said-first drive means. i

8. In an automatic machine tool o-f th character described, va work support, a re ciprocating tool slide, rotary feed means connected to said slide to feed it toward and Y away from said work at a given speed, drive. means therefore adapted to drive said feed means in one direction, a clutch for said drive means, other feed means connected to said slide, drive -means therefore, adapted to drive said other feed means in one direction at a different speed from said first feed means, a clutch for said second drive means, clutch shifting means connected to said clutches -whereby as one is connected the other is disconnected, means actuated at the end of the movement of` said slide toward the Work adapted to actuate saidl clutch shifting means to connect said first drivv ing means to effect return movement of the slide and means carried by said first feed means adapted to actuate said shifting means to neutral position at the end oftheV return movement of the slide whereby both clutches are disengaged.

9. In an automatic machine tool of the character described, a work support, a tool slide, variable speed feed means adapted to move said slide inworking relation with the work at ay givenspeed, and to move it inA character described a work support, a tool.`

slide, variable speed feed means adapted to move said slide to a given point in relation to the work at one speed and to the limit of its traverse at a different speed, and to move said slide in return direction out of relation with the work at relative rapid speed, stop means for said slide adapted to limit its movementJ toward the work, and a yieldable connection between said feed means and said slide whereby said slide remains stationary for aI relatively short period before said return feed movement.

l1. In an automatic machine tool of the character described, a work support. a tool slide, variable speed feed means adapted to move said slide to a given point in relation to the work at relatively rapid speed Aand to the limit of its traverse at relatively slow speed, and to move said slide in return direction out of relation with the work at relatively ra id speed, stop means for said slide adapte to limit its movement toward the Work, and a yieldable connection between said feed means and said slide whereby said slide remains stationary for a relatively short period before said return feed movement. y

12. In an automatic machine tool of the character described, a work support, atool slide, feed means adapted to move said slide to a given point in relation to the work at one speed, other feed means adapted to move sa'id slide to the limit of its'traverse at a different speed, said first feed means adapted to move said slide in' return direction out means to start said feed means at the end of a given period.

13. In an automatic machine tool of the character described, a-Work support, a tool slide, feed means adapted to move said slide to a given point in relation to the work at one speed, other feed means adapted to move said slide and to the limit of its traverse at a different speed, said first feed means adapted to move said slide in return direction out of relation with the work at constant speed, and means actuated by said slide adapted to stop the operation of said feed means and to start it after a given period.

14. In an automatic machine tool of the character described, a work support, a reciprocating tool slide, independent different speed drive means geared to said slide, one of said drive means being continuously rotatable in one direction during the feed of the slide and adapted to impart initial feed and complete return movement thereto, and means kfor operatively connectinnr one and disconnecting the other at a predetermined point in the feed of the slide.

l5. In an automatic machine tool of the character described, a Work support, a: tool' slide, rapid and slow feed means independently eared to said slide, driving means for driving said feed means respectively in one direction, clutch means for connecting said respective drive means to said respective feed means, and control means ada ted to engage one of said clutch means an disenr gage the other at predetermined movement ofthe slide.

16. In an automatic machine tool of the character described, a work support, a tool slide, rapid and slow feed means independentlyv geared to said slide, driving means for driving said feed means respectively in one direction, clutch means for connecting said respective drive means to said respective feed means, control means adapted to be rimarily actuated to engage said rapid eed clutch means, means ada ted to actuate said control means at a pre etermined point in thefeeding movement of said slide to disengage said rapid feed clutch means and engage said slow feed clutch means, and means adapted at the end of the feeding movement of said slide to disengage said slow feed clutch means and engage said rapid feed clutch means to effect rapid return movement of said slide.

17. In an automatic machine tool of the character described, a work support, a tool slide, rapid and slow feed means independently geared to said slide, driving means for driving said feed means respectively in one direction, clutch means for connecting said respective drive means to said respective feed means, control means adapted to be primarily actuated to engage Said rapid feed clutch means, adjustable means adapted to actuate said control means at a predetermined point: in thefeeding movement of said slide to dis- 'engage said rapid feed clutch means and engage said slow feed clutch means, and means adapted at the end of the feeding movement of said slide to disengage said slow feed clutch means and engage said rapid feed clutch means to effect rapid return movement of said slide.

18. In an automatic machine tool of the character described, a work support, a tool slide, rapid and slow feed means independently geared to said slide, drivingl means for driving said feed means respectively in one direction, clutch means for connecting said respective drive means to said re ective feed means, control means adapted to e primarily actuated to engage said rapid feed clutch means, means adapted to actuate said control means at a predetermined point in points in the Illu the feeding movement ef Seid slide te dises.

gage said rapid feed clutch means and en- 19. In an automatic machine tool of thel character described, a work support, a tool slide, rapid and slow feed means independently geared to said slide, driving means for driving said feed means respectively in 'one direction, clutch means for connecting said 4respective drive means to said respective feed means, control means adapted to be primarily actuated to engage said rapid -feed clutch means, means adapted to actuate said control means at a predetermined point in the feeding movement of said slide to disengage said rapid feed clutch means and engage said'v slow feed clutchmeans, means adapted at the end of the feeding movement of said slide to disengage said slowl feed clutch means and engage said rapid feed clutch means to effect rapid return movement of said slide,

driving said feed means respectively in one direction, clutch means for connecting said respective drive means to said respective feed means, control means adapted to be primarily actuated t0 engage said rapid feed clutch means, means adapted to actuate said control means at a predetermined point inthe feeding movement of said slide to disengage said rapid feed clutch means and engage said slow feed clutch means, means adapted at the end of the feeding movement of said slide to disengage said slow feed clutch meansand engage said rapid feed clutch means to effect rapid return movement of said slide, means adapted at the end of said return movement to' move said rapid and slow feed clutchmeans into neutral position, and means actuated by said slide adapted at the end of a predetermined period to actuate said control means to primarily engage said rapid feed clutch means.

21. In an automatic machine tool of the character described, a work support, a tool slide, a cross head connected to'said tool slide including a vertical rack, rotatable crank means connectedto said cross head to reciprocate it, a driving gear engaging said rack to reciprocate it at different speed and independently from said crank means, means for driving said crank means, means for driving said gear, clutch means for connecting said crank means and its driving means,

clutch, means for Yconnecting said gear and its driving means, clutch shifting means adapted to engageons of said clutch means and disengage the other, and control means adapted to be actuated at predetermined point to operate said clutch shifting means to effect variable feed of said slide. i

of the 22. In an automatic machine tool character described, a work support a tool f slide, a cross head connected to sald slide having a transverse slot and a vertical rack, rotatable crank means engaging :said slot and adapted to reciprocate said cross head, a. driving gear engaging said rack to reciprocate it at different speed and independently from said crank means, means for driving said crank means, means for driving said gear, clutch means for connecting said crank means to its driving means, clutch means for connecting said gear and its driving means, clutch shifting means adapted to en age one of said clutch means and dise ge t e other, and control means adapted tgbe predetermined pointsto operate said clutch sniftmg means to effect variable feed of said s 1 e.

actuated at 23. In an automatic machine tool of the i means forboth said feed means for driving them respectively in one direction, clutch means for connecting said eed means to their respective drive means, clutch shifting means adapted to engage one of said clutch means andA disengage the other, control means for said clutch shifting means, and means on said first feed means adapted at a predetermined point to actuate said control means to disengage the clutch means of said first feed means and engage the clutch means of said lother feed means. l

24. In an automatic machine tool of the character described, a work support, a tool slide, feed means having an eccentric connection with said tool slide adapted during rotation in'one direction to effect feed and recharacter described, a workvsupport, a tool turn movement of the slide, other feed means connected to saidslide adapted to feed it at a different speed from the normal speed of said first feed means,"independent drive means for both said feed means for driving them respectively in one direction, clutch means for connecting said feedA means to their respective drive means, clutch shifting means adapted to engage oneof said clutch means and disengage the other, control means for said clutch shifting means, and adjustable means on said first feed means adapted at a predetermined point to actuate said control means to disengage the clutch means of said first feed means and engage the clutch means of said other feed means.

25. In an automatic machine tool of the character described, a work support, a tool slide, feed means having an eccentric connection with said tool slide adaptedduring rotation in one direction to effect feed and return movement of the slide, other feed means connected to said slide adapted to feed it at a different speed from the normal speed of said first feed means, independent drive means for both said feed means for driving them respectively in one direction, clutch means for connecting said feed means to their respective drive means, clutch shifting means adapted to engage one of said clutch means and disengage the other, control means for said clutch shifting means, means on said first feed means adapted at a predetermined point to actuate said control means to disengage the clutch means of said first feed means and engage the clutch means of said other feed means, and means adapted to be actuated at the completion of the forward feed of the slide to operate said control means whereby said clutch shifting means is actuated to disengage said clutch means of said other feed means and engage said clutch means of said firstl feed means, `whereby return movement of said slide is effected by said first feed means.

26. In an automatic machine tool of th character described, a work support, a tool slide, feed means having an eccentric connection with said tool slideadapted during rotation in one direction to effect feed and return movement of the slide, other feed means con nected to said slide` adapted to feed it at a different speed from the normal speed of said first feed means, independent drive means for both said feed means for driving them respectively in one direction, clutch means for connecting said feed means to their respective drive means, clutch shifting means adapted to engage one of said clutch means and disengage the other, control means for said clutch shifting means, means on said first feed means adapted at a predetermined point to actuate said control means to disengage the clutch means of said first feed means and engage the clutch means of said other feed means, means adapted to be actuated at the completion of the forward feed of the slide to operate said control means whereby said clutch shiftingmeans is actuated to d1sengage said clutch means of said other feed means and engage said clutch means of said first feed means, whereby return movement of said slide is eiected by said first feed means, and means on said first feed means adapted at the end of said return movement to actnate said control means to disengage said clutch means of said first feed means.

Lesa-ros 27. In an automatic machine tool of the character described, a work support, a tool slide, feed means havin an eccentric connection with said tool side adapted during rotation in one direction to effect feed and return movement of the slide, other feed means connected to said slide adapted to feed it at a different speed from the normal s eed of said first feed means, independent rive means for both said feed means for driving them respectively in one direction, clutch said clutc shifting means is actuated to disengage said clutch means of said other feed means and engage said clutch means of said first feed means, whereby return movement of said slide is effected by said first feed means, means on said first feed means adapted at the end of said return feed movement to move both of said clutch means into neutral position.

28. In an automatic machine tool of the character described, a Work support, a tool slide, feed means having an eccentric conn/ed tion with said tool slide adapted during rolllU tation in one direction to effect feed and return movement of the slide, other feed means connected to said slide adapted to feed it at a different speed from the normal speed of said first feed means, independent drive means for both said feedmeans for drivin them respectively in one direction, clutc means for connecting said feed means to their respective drive means, clutch shiftin means adapted to engage one of said clutc means and disenga e the other, control means for said clutch shi ting means, means on said first feed means adapted at a predetermined point to actuate said control means to disengage the clutch means of said4 first feed means, and engage the clutch means of said other feed means, means adapted to be actuated at the completion of the forward feed of the slide to operate said control means whereby said clutch shiftin means isl actuated to disengage said clutc i means of said other feed means and engage said clutch means of said first feed means, whereby return movement of said slideis effected by said first feed means, means on said first feed means adapted at the end of said return movement to actuate said control means to disengage said clutch means of said first feed means, and neutralizing means adapted to be actuated bysaid first feed means to` maintain both .of said yclutch means in character described, a work support, a tool slide, feed means having an eccentric con-V nection'with said tool slide adapted during rotation in one direction to effectfeed and return movement of the slide, other feed means connected 'to said slide adated to feedit at a different speed from tie normal speed of said rst feed'means, independent drive ineans for bot-h said feed means` for driving them respectively in one direction, clutch means for connecting said feed means to their respective drive means,

clutch shifting means adapted to engage one of said clutch means and disengage the other, control means for said clutch shifting means, means on said first feed means adapted at a predetermined point to` actnate said control means to disengage the clutch means of said first feed means and engage the clutch means of said other feed means, means adapted to be actuated at the completion of the forward feed of the slide to operate said control means whereby said clutch shifting means is actuated to disengage said clutch means of said other feed means and engage said clutch means of said first feed means, whereby return movement of said slide is effected by said first feed means, means on said first Afeed means adapted at the end of said -return feed movement to move both of said clutch means into neutral position, and means actuated by said slide adapted at the end of a predetermined period to actuate said control means primarily engage said clutch means of said first feed means.

30. In an automatic machine tool of the character described, a work support, a tool slide, rapid and slow feed means independently geared to said slide, independent driving means for said respective feed means, sliding clutches for connecting said respective drive means to said respective feed means, a pivoted clutch shifting lever adapted to engage one of said clutch means and disengage the other, a sliding control member having a cam yieldably engaged with said lever and adapted upon a predetermined movement to shift said lever with a snap action, and means adapted to move said control member atpredetermined points in the movement of said slide to effect variablespeed feed thereof.

3l. In an automatic machine tool of the character described, a work support, a tool slide, rapid and slow feed 4means independcntly geared to said slide, independent driving means for said respective feed means, sliding clutches for connecting said respective drive means to said respective feed means, a pivoted clutch shifting lever adapted to engage one of said clutch means and disengage the other, asliding control member having a cam yieldably engaged with ,saidlever and adapted upon a predetermined movement to shift said lever with a snap action, and means adapted at a predetermined point in the forward feed of said slide to; move said control member to disengage said rapid feed clutch andengage said slow feed clutch, and means adapted to be actuated at the end of said slow feed to move said control member to engage Said rapid feed clutch means and disengage said slow feed clutch means, to effectrapid return movement of said slide.

32. In an automatic machine tool of the characterdescribed, a work support, a tool slide, rapid and slow feed means independently geared to said slide, independent driviri g means for said respective feed means, sliding clutches for connecting said respective drive means to said respective feed means, a pivoted clutch shifting lever adapted to engage one` of said clutch means and disengage the other, a sliding control member having a cam yieldably engaged with said lever and adaptedupon a predetermined movement to shift said lever with a snap action, means adapted at a predetermined point in the forward feed of said slide to move said' control member to disengage said rapid clutch means, and engage said slow clutch means, means adapted to limit the sliding clutches for connecting said respective drive means to said respective feed means, a pivoted clutch shifting lever adapted to engage one of said clutch means and disengage the other, a sliding control member having a cam yieldably engaged with said lever and adapted upon a predetermined movement to shift said lever with a member to a point insufficient to shift said lever, means ada ted to limit the forward movement of sai slide, and means adapted after a predetermined stationary period at the end of said forward feed to complete the movement of :said control member to disen- I gage said slow feed clutch and engage said *Y rapid feed clutchtoetect rapid return movement of said slide.

34. In an automatic machine tool of the character described, a work support, a tool slide, rapid and slow feed means independently geared to said slide, independent driving-means for said respective feed means, sliding clutches for connecting said res ective drive means to said rapid and slow` eed means, the latter clutch havin` Ainclined ratchet teeth, a pivoted clutch shiting lever adapted to engage one of said clutch means and disengage the other, a sliding control member having a. cam yieldably engaged with said lever and ada ted upon a predetermined movement to slift said lever` with a snap action, means adapted at a predetermined point in the forward movement of said slide to move said control member to 'disengage said rapid feed clutch means and engage said slonT feed clutch means, means adapted at the end of said forward movement of the slide to partially shift said control member to a point insufficient to shift said lever, means adapted to limit the forlWard movement of said slide, said inclined ratchet teeth of said slow feed clutch means adapted after a predetermined stationary period at the end of said forward feed to shift said slow feed clutch means to thereby complete the movement of said control member and engage said rapid feed clutch means,

to effect rapi return movement of said slide. 35. In an automatic machinetool of the character described, a work support, a .tool

slide, independent diierent speed drivev` memos means movin said slide, and ever means actuate by sai last named means adapted to move both of said drive means into neu-A eared to said slide, rota means for l means geared to said slide, manually operf' able means for moving either of said means into operative position or moving both into neutral position, manually o erablev rotary means adapted to be primari y moved longitudinally to operatively relate it with said slide and secondarily rotated to shift said slide, and lever means actuated by said rimary movement adapted to move said rst manually operable means into neutral position. i

V 37. In an automatic machine tool of the character described, a work support, a tool slide, a rotary tool in said slide, feed works for moving said slide into and out of relation with the work, means in said feed Works adapted to rotate said tool during the traverse of the slide, means actuated at the end of the return feed movement of the slide 05 adapted to stop operation of the feed Works for a predetermined period and to automatically start actuation at a predetermined point after said period.

Signed at Bridgeport in the county`of Fairfield and State of Connecticut this third day of April A. D., 1924.

f EDWARD r. BULLARD, JR. 

